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=Question 1

=Question 2

=Question 3, 4, 5, 6

=Question 7, 8

=Question 9

 

9. Carry out the following osmosis experiment:

9. Carry out the following osmosis experiment:
Take four peeled potato halves and scoops each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
(a) Keep cup A empty
(b) Put one teaspoon sugar in cup B
(c) Put one teaspoon salt in cup C
(d) Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and answer the following:
(i) Explain why water gathers in the hollowed portion of B and C.
(ii) Why is potato A necessary for this experiment?
(iii) Explain why water does not gather in the hollowed out
Portions of A and D.
Answer:

(i) Water gathered in the hollowed portions of Potato in B and C by the process of osmosis.
(ii) Potato A is necessary in this experiment because it act as a contro experiment.
(iii) Water does not gather in the Hollowed portion of potato A as it was empty. Water also does not gather in the cup D because there potato used was boiled which makes it inactive as after boiling its protein structure ware damaged.


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9. Carry out the following osmosis experiment:

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